CreateExportTask

Creates an export task, which allows you to efficiently export data from a
log group to an Amazon S3 bucket.

This is an asynchronous call. If all the required information is provided, this
operation initiates an export task and responds with the ID of the task. After the
task has started,
you can use DescribeExportTasks to get the status of the export task. Each account can
only have one active (RUNNING or PENDING) export task at a time.
To cancel an export task, use CancelExportTask.

You can export logs from multiple log groups or multiple time ranges to the same
S3 bucket. To separate out log data for each export task, you can specify a prefix
that will
be used as the Amazon S3 key prefix for all exported objects.